Archived: GC Test - Client vs. Server

JVM Tutorials - Herong's Tutorial Examples

∟Archived: GC Test - Client vs. Server

This section provides a tutorial example on testing garbage collection by comparing performances between HotSpot Server VM and HotSpot Client VM.

I also made some tests to compare between the client version and the server version of JDK 1.4.0.

herong> java -server -Xms2m -Xmx8m GCTest 16 24 > tail_16_24.out

But the program ran out of memory the same way as the client version:

Time   Total   Free   Free   Total   Act.   Dead   Over
sec.    Mem.   Mem.   Per.    Obj.   Obj.   Obj.   Head

   0    1984   1726    86%       0      0      0    258
   0    1984   1593    80%     128    128      0    263
   1    1984   1463    73%     256    256      0    265
....
  19    5260    357     6%    4736   4736      0    167
  19    5260    227     4%    4864   4864      0    169
  20    8128   2997    36%    4992   4992      0    139
  20    8128   2867    35%    5120   5120      0    141
  21    8128   2866    35%    5120   4992    128    142
  21    8128   2864    35%    5120   4864    256    144
....
  41    8128    482     5%    7424   4352   3072    222
  42    8128    352     4%    7552   4480   3072    224
  42    8128    223     2%    7680   4608   3072    225
Exception in thread "main" java.lang.OutOfMemoryError